Earthenware



May 18 1926.

w. L. BURLEY KILN FOR BURNING EARTHENWARE Filed Jan. 15, 1925 2 Sheets-Sheet 2 0 G R ,7 /N%// 5 Z/ m 7M6 a 2 M u 2% w WA M H 12 w r a, 6

M Q m a m I F d a a wr i w m/ Mm m 5R. 3 mm a, m W 7/ cooling of the or Patented May 18, 1926.

WILSON it. runner, or onoonsvrnnn, onro.

PATENT OFFICE.

KILN non BURNING EARTHENWARE.

i .Application filed January My invention relates to improvements in kilns for burning earthenware.

An important object of the invention is to provide a kiln of the above mentioned character in which the preheating, burning, and "renware may be carried an the articles are advanced out continuously, through the kiln. i a A further object of the invention is to provide means for regulating the heat within the several zones oi the kiln tor Ieltecting the proper treatment of the earthenware.

Other objects and advantage of the invention will be apparent during the course of the .lollowlng description. I

In the accompanying drawings tliorining a part of this specification and in which like numerals are employed to designate like parts throughout the same, y

Figure 1 is a central vertical longitudinal section through a kiln embodying 1nyinvention, i i y lli El a horizontal longitudinal sec-- tion taken on line 2-2 of Figure 1,

Figure 3 is a transverse section taken on line 3---3 of Figure 2, and, c

Figure l is a similar view taken on line 41 d of Figure 1. y a

y In the drawings wherein for the pturpose of illustration is shown a preferred embodiment of my invention, the kiln is shown as including a long kiln casing or shell, 53, formed of suitable refractory material. This kiln casing embodies a longitudinally eX- tending chamber or passage 6, which loads at its lowerend into a pit 7, shown. M ounted upon the bottom oi? the pit 7 are rails 8 suitably secured. thereto, as shown. Air cir-- culating or cooling openings 9 are formed in the side walls of the pit, and lead into the sauce, above the rails 8.

The sidewalls oil the kiln casing or shell 5 are provided in their lower portions with interior grooves 10, extendiu longitudinally oi? the same, throughout their entire length. These grooves are adapted to receive. a slab 11, arranged upon a layer at asbestos 12 or other insulating material which carried by thetop 18, of a truck 14.. This truck is equipped with wheels 15, traveling upon the rails 8. The longitudinal edges oil. the slab 11, which is preferably formed of refractory material, project into the grooves 10, above stated, and I preferably providestrips of asbestos 16, or other insulating material,

secured to the bottom walls oi these grooves 15,1925. Serial m. 2,671.

near and beneath the slab 11. lit thus seen that the slab, groovesand associated elements, constitute cells Itor prevent the heated gases from passingdownwardy into proximity to the truck and parts thereol. Arranged orl rrxned upon oriwithinthe opposite sides o. the kiln casing or shell 5 are fire boxes 17.. The .tuel is led into. these fire bones through openings 18, inthe outer ends thereoi. The combustion chambers of these lire boxes dischargedirectly intoflthe longitudinal chamber or passage t, as shown at 19. lrloriaontal longitudinal air supply-- ing tines are formed in the side walls oil? the kiln casing and also extend through the walls oi? the tire burns, as shown. :The :tor-

ward and oi these lines are (ipen to theatnosphere while their rear ends. are closed. clearly shownin Figure 4, the horizontal air supply lines 20 lead, at their rear ends, into upstanding fines 21, ;discharging into a horizontal line 22, which connl'iunicates with. a stackQS. This stack is prelcrabiy provided in one or both sides with slots or openings 24, which may be partly or wholly closed by a brick or bricks, thereby regulating the draft from the stack.

The opposite side walls ol the kiln casin are provided with transverse cooling open ings or flues 25, in communication with the longitudinal fines 20 and the longitudinal chamber 6. These side walls are also pro vided with transverse dratt flues 26, in coinmunication with the rear ends oi? the "tines 520 and the chamber 6. y

The truck 14; has transverse hollow uegger blocks 27 arranged upon its slab Ill, shown. These sagger blocks are spaced from the side walls oi the kiln casing and are oi sufficient height to project across the lower portions of the transverse flues and 26, for a considerable distance. The upper portions of these flu'es entcnd above these sagger blocks. The earthenware articles 28, to be baked, are arranged upon the sagger blocks.

The intermediate portion of the kiln casing constitutes the baking or heating Zone, and is designated generally by A. The end portion B, is the pro-heating zone and the end portion G is the cooling zone.

The truck carrying the earthenware articles to be baked is passed into the preheating zone B, and is continuously advanced through the kiln, at a suitable speed. The heated gases or, products of combustion act upon the articles to be naked, as they pass through the preheating zone into the heating or baking zone. When the truck passes through the cooling zone, C, the articles of earthenware gradually cool, and this cooling may be had by the heat passing through the transverse cooling fines 25. It is obvious that the products of'comhustion from the fire boxes 17 discharge into the central portion of the chamber 6, or :theiloaking zone of the kiln, and then pass to the left, into the pie-heating zone. These products of combustion then pass outwardly through the draftfluesQGinto the rear ends of the longitudinal lines 20, and then to the stack. By partly or wholly uncoveringthe opening or slot 24, the draft may be regulated or broken and the heated gases will pass more slowly through theldraiitflues 26.

It is to be understood that the termini my invention herewith shown and described is to be taken as a preferred example of 'the same, and that various changes in the shape, size, and arrangement of parts may be resorted to Without departing from the -spirit ot' my invention or the scopeot the suhjoined claim.

Having :thus described my invention, I claim '2' a an a kiln for burningearthenware, a long kiln. casing having sidewalls forming,- a

longitudinal tunnel, said tunnel having an ranged adjacent to the outer end oi the preheating zone and in communlcatiou with the ends of the longitudinal lines, the pro-heating zone having the major portion of its length arranged between the stack and the baking zone, the side walls of the tunnelin the pres-heating zone having trans- .verse flues which lead from the tunnel. to the longitudinal fines, the side walls of the tunnel in the cooling zone also having transverse flues leading from the tunnel to the longitudinal flues, said longitudinal flues having their ends adjacent to the cooling zone open to the atmosphere and their ends adjacent to the pre-heating zone closed to the atmosphere, said longitudinal fines be ing free from direct communication with the'fire boxes.

in testimony whereof I athx my s1gnature.

WILSON L. BURLEY. 

